Dear All, I have exchange server 2007 Cluster SCC working fine and I was assigning send as permission to users on some mailbox and it was working fine, from two days it stop working for users, I removed the permissions and re assign it again but it still not working and give this error to the users:
You are not allowed to send this message because you are trying to send on behalf of another sender without permission to do so. Please verify that you are sending on behalf of the correct sender, or ask your system administrator to help you get the required permission.
Diagnostic information for administrators:
/O=FIRST ORGANIZATION/OU=EXCHANGE ADMINISTRATIVE GROUP (FYDIBOHF23SPDLT)/CN=RECIPIENTS/CN=Username#MSEXCH:MSExchangeIS:/DC=ae/DC=Domain:ClusterName[578:0x000004DC:0x0000001D] #EX#